Damper with uniform force value

Abstract

The uniform force value damper comprises a shell, a sealing ring, an ejector pin, a connecting piece, a piston block and a spring, the ejector pin comprises a main body section and an inserting section, an inserting hole used for inserting the inserting section is formed in the top of the piston block, the diameter of the inserting section is smaller than that of the main body section, and the connecting face of the inserting section and the main body section is an integral cutting plane. The rod arm of the inserting section is sleeved with a connecting piece, the top face of the connecting piece horizontally abuts against the cutting plane, and the bottom face of the connecting piece horizontally abuts against the top face of the piston block. According to the utility model, the connecting sheet is changed into a split type, and the thimble and the piston block are arranged in an inserting and covering manner, so that the stability and uniformity of force values can be realized, and the yield is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dampers, in particular to a uniform force value damper. Background Art

[0002] A damper is a shock-absorbing and buffering device, which is commonly used for buffering the closing of doors. Generally, a door closing damper usually includes a housing, a spring, a piston and a buffering contact pin. The spring is connected to the piston and is built into the housing with built-in grease. The spring slides into the housing and is connected to the piston. When subjected to force, the pin hits the piston inward, and the piston squeezes the spring to deform, providing impact buffering. At the same time, the piston will press the grease to flow in the upper and lower spaces of the housing, slowing down the instantaneous impact force, thereby providing a slower damping force.

[0003] At present, the traditional ejector pin is generally inserted into the top of the piston. In order to increase the force-bearing area and seal the grease return port on the top of the piston, the conventional operation is to weld a round hole gasket on the inner side wall of the ejector pin, and the round hole gasket is then against the top of the piston. However, there is an R angle at the welding point between the round hole of the round hole gasket and the outer wall of the ejector pin, that is, the chamfer existing in the welding. This makes it impossible for the chamfer to be sealed flush with the top of the piston, and cross-flow is easily generated when the grease returns. This causes the force output by the ejector pin to be unstable. If it exceeds a certain limit, the product cannot meet the production parameter requirements, the yield rate is low, and the ejector pin insertion position is prone to swing left and right, resulting in a short service life of the ejector pin.

[0004] Based on this, the utility model designs a uniform force damper to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a uniform force damper to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A uniform force damper, comprising a housing, a sealing ring, an ejector pin, a connecting piece, a piston block and a spring, wherein a piston block is axially slidably installed in the housing, a spring for elastically supporting the piston block is installed at the bottom of the housing, grease is filled between the piston block and the spring, a sealing ring is provided at the top opening of the housing, the ejector pin is sealably slidably penetrates the sealing ring and extends into the housing, and the bottom of the ejector pin is inserted with the top of the piston block through the connecting piece;

[0008] The ejector pin comprises a main body section and an inserting section, a plug-in hole for inserting the inserting section is provided on the top of the piston block, the diameter of the inserting section is smaller than the diameter of the main body section, the interface between the inserting section and the main body section is an integral cutting plane, a connecting piece is sleeved on the rod arm of the inserting section, the top surface of the connecting piece is horizontally pressed against the cutting plane, and the bottom surface of the connecting piece is horizontally pressed against the top surface of the piston block.

[0009] Preferably, the piston block comprises an annular groove opened in the middle, an O-ring for slidingly contacting the inner wall of the housing is clamped in the annular groove, and an overflow channel mechanism for grease overflow and backflow is provided on the piston block.

[0010] Preferably, the overflow channel mechanism includes a plurality of overflow ports connected to the annular groove, the overflow ports are arranged on the bottom end surface of the piston block, a reflux annular groove is arranged on the top of the piston block, an overflow channel connected to the overflow port is vertically arranged at one end of the reflux annular groove, an oil drain port for grease to flow back downward is arranged at the other end of the reflux annular groove, and the bottom surface of the connecting plate is pressed and covered above the reflux annular groove.

[0011] Preferably, sealing gaskets are provided on both the upper and lower sides of the sealing ring.

[0012] Preferably, the diameter of the connecting piece is smaller than the diameter of the top of the piston block.

[0013] Preferably, vertical grease flow openings are distributed circumferentially around the side walls around the top of the piston block.

[0014] Preferably, the top surface of the piston block is provided with an adsorption hole for adsorbing the bottom surface of the connecting plate.

[0015] Preferably, the surfaces where the piston block and the connecting sheet are pressed together are configured to be funnel-shaped.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model can realize stable and uniform force value by changing the connecting piece into a split type and combining the ejector pin and the piston block with the plug-in cover arrangement, thereby greatly improving the yield rate.

[0018] The overflow channel mechanism provided in the utility model will not cause overflow, the grease flow rate is uniform and continuous, and the overall force value of the ejector pin is also relatively uniform.

[0019] The connecting piece provided in the utility model is smaller than the piston block, which mainly prevents the rising grease from directly lifting the edge, and prevents the problem of the edge of the connecting piece being bent and pressed unevenly during long-term work. The grease flow ports provided around the piston block mainly facilitate the rapid flow of grease.

[0020] The adsorption holes and the funnel-shaped contact surface provided in the utility model can improve the installation error tolerance and at the same time increase the service life of the connecting piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a vertical cross-sectional view of the utility model;

[0023] Figure 2 It is a schematic diagram of the overall front external structure of the utility model;

[0024] Figure 3 for Figure 2 Schematic diagram of the structure after removing the shell;

[0025] Figure 4 for Figure 3 A partial exploded view of

[0026] Figure 5 It is a schematic diagram of the structure of the piston block.

[0027] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0028] Housing 1, sealing ring 2, sealing gasket 3, ejector pin 4, connecting piece 5, piston block 6, ring groove 60, overflow port 61, overflow channel 62, reflux ring groove 63, oil drain port 64, insertion hole 65, adsorption hole 66, O-ring 7, spring 8. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0030] See also Figure 1-5 , the utility model provides a technical solution:

[0031] A uniform force damper, comprising a housing 1, a sealing ring 2, an ejector pin 4, a connecting piece 5, a piston block 6 and a spring 8, wherein the piston block 6 is slidably installed in the housing 1 along the axial direction, the spring 8 for elastically supporting the piston block 6 is installed at the bottom of the housing 1, the space between the piston block 6 and the spring 8 is filled with grease, the top opening of the housing 1 is sealed with a sealing ring 2, the ejector pin 4 is sealingly slidably penetrated through the sealing ring 2 and extends into the housing 1, and the bottom of the ejector pin 4 is inserted with the top of the piston block 6 through the connecting piece 5;

[0032] The ejector pin 4 includes a main body section and a plug-in section. The top of the piston block 6 is provided with a plug-in hole 65 for plugging the plug-in section. The plug-in section has a smaller diameter than the main body section. The connecting surface between the plug-in section and the main body section is an integral cutting plane. A connecting piece 5 is sleeved on the rod arm of the plug-in section. The top surface of the connecting piece 5 is horizontally pressed against the cutting plane, and the bottom surface of the connecting piece 5 is horizontally pressed against the top surface of the piston block 6.

[0033] During operation, the ejector pin 4 is designed with two sections of different diameters. The plug-in section is used to cooperate with the piston block 6. At the same time, the joint between the plug-in section and the main section does not require welding. An integral cutting plane is adopted to cooperate with the horizontal connecting piece 5. The upper part of the connecting piece 5 can be pressed against the ejector pin 4 to ensure that the ejector pin 4 does not shake when subjected to force. The lower part of the connecting piece 5 can be tightly covered with the piston block 6. The ejector pin 4 will not be loosely inserted or the cover will not be tightly sealed due to the welding chamfer, thereby ensuring the continuous and uniform grease reflux, thereby greatly improving the product yield.

[0034] The piston block 6 includes a ring groove 60 opened in the middle, and an O-ring 7 for slidingly contacting the inner wall of the housing 1 is clamped in the ring groove 60. The piston block 6 is provided with an overflow channel mechanism for grease overflow and reflux;

[0035] The overflow channel mechanism includes a plurality of overflow ports 61 communicating with the annular groove 60, the overflow ports 61 are provided on the bottom end surface of the piston block 6, a reflux annular groove 63 is provided on the top of the piston block 6, an overflow channel 62 communicating with the overflow port 61 is vertically provided at one end of the reflux annular groove 63, an oil outlet 64 for grease to flow downward is provided at the other end of the reflux annular groove 63, and the bottom surface of the connecting piece 5 is pressed and covered above the reflux annular groove 63;

[0036] During operation, when the ejector pin 4 is forced to move downward, the ejector pin 4 presses the piston block 6 through the connecting piece 5, and the piston block 6 exerts a reverse pressing force on the connecting piece 5 through the spring 8, so that the connecting piece 5 can be well attached to the ejector pin 4 and the piston block 6 respectively. At the same time, the piston block 6 drives the O-ring 7 to slide downward, and the O-ring 7 squeezes the grease under the piston block 6. The grease is squeezed upward from the overflow port 61 and the overflow channel 62, and is discharged to the oil discharge port 64 through the reflux ring groove 63. Since the connecting piece 5 covers and presses on the reflux ring groove 63, no overflow will occur at the reflux ring groove 63, and the grease flow rate is uniform and continuous. The overall force value of the ejector pin 4 is also relatively uniform. After the ejector pin 4 loses the external force, the spring 8 recovers upward, and the overflowed grease flows back to the bottom again, and the ejector pin slowly returns to the initial ejection state, thereby completing the damping action of the ejector pin being slowly compressed and slowly reset under force.

[0037] Wherein, sealing gaskets 3 are provided on both the upper and lower sides of the sealing ring 2;

[0038] During operation, the provided sealing gasket 3 can improve the sealing performance inside the housing 1 . Example

[0039] The difference between this embodiment and embodiment 1 is that:

[0040] Wherein, the diameter of the connecting piece 5 is smaller than the top diameter of the piston block 6;

[0041] Furthermore, vertical grease flow ports are distributed circumferentially around the top sidewalls of the piston block 6;

[0042] During operation, the connecting piece 5 is smaller than the piston block 6 to prevent the rising grease from directly lifting and acting on the edge of 5, so as to prevent the edge of the connecting piece 5 from bending and being uneven during long-term operation. The grease flow ports arranged around the piston block 6 are mainly used to facilitate the rapid flow of grease. Example

[0043] The difference between this embodiment and embodiment 1 is that:

[0044] The top surface of the piston block 6 is provided with an adsorption hole 66 for adsorbing the bottom surface of the connecting piece 5;

[0045] Furthermore, the surfaces where the piston block 6 and the connecting piece 5 are pressed together are configured to be funnel-shaped;

[0046] During operation, the connecting piece 5 is always stressed in the center. The ejector pin 4 will warp the connecting piece 5 on all sides due to long-term operation, resulting in a loose fit of the connecting piece 5 and uneven force. Alternatively, the ejector pin 4 may be inserted with too much force and directly warp the connecting piece 5, resulting in defective products. The funnel shape can directly press 5 tightly during insertion, providing a larger installation error deviation. Even if the connecting piece 5 is deformed by stress in the center and warped on all sides, it can just adhere to the funnel-shaped top surface of 6, thereby improving the installation tolerance and the service life of the connecting piece 5.

[0047] The following tensile performance tests were conducted on the product of the utility model and the conventional product in the above-mentioned embodiment 1. The conventional product here is an equivalent damper in which the ejector pin 4 and the connecting sheet 5 are connected by welding:

[0048] Test specifications: 0.2*1.5, 100.000mm;

[0049] Test speed: 120.000mm / min;

[0050] Gauge length: 100.000mm;

[0051] In the tensile performance test: Force deformation diagram of traditional products:

[0052]

[0053] Force value deformation diagram of this embodiment 1:

[0054]

[0055] The experimental parameters are as follows:

[0056] It can be seen from the above experiments that the force value of the improved damper of the utility model has been significantly improved in uniformity.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A uniform force damper, comprising a housing (1), a sealing ring (2), a ejector pin (4), a connecting sheet (5), a piston block (6) and a spring (8), characterized in that: A piston block (6) is axially slidably mounted in the housing (1); a spring (8) for elastically supporting the piston block (6) is mounted at the bottom of the housing (1); the space between the piston block (6) and the spring (8) is filled with grease; a sealing ring (2) is provided to seal the top opening of the housing (1); the ejector pin (4) is sealingly slidably penetrates the sealing ring (2) and extends into the housing (1); the bottom of the ejector pin (4) is plugged into the top of the piston block (6) via a connecting piece (5); The ejector pin (4) comprises a main body section and an inserting section, the top of the piston block (6) is provided with an inserting hole (65) for inserting the inserting section, the diameter of the inserting section is smaller than the diameter of the main body section, the connecting surface of the inserting section and the main body section is an integral cutting plane, a connecting piece (5) is sleeved on the rod arm of the inserting section, the top surface of the connecting piece (5) is horizontally pressed against the cutting plane, and the bottom surface of the connecting piece (5) is horizontally pressed against the top surface of the piston block (6).

2. A uniform force damper according to claim 1, characterized in that: The piston block (6) comprises an annular groove (60) opened in the middle, an O-ring (7) for slidingly contacting the inner wall of the housing (1) is provided in the annular groove (60), and an overflow channel mechanism for grease overflow and backflow is provided on the piston block (6).

3. A uniform force damper according to claim 2, characterized in that: The overflow channel mechanism comprises a plurality of overflow ports (61) in communication with the annular groove (60), the overflow ports (61) being arranged on the bottom end surface of the piston block (6), the top of the piston block (6) being provided with a return annular groove (63), one end of the return annular groove (63) being provided with an overflow channel (62) in communication with the overflow port (61), the other end of the return annular groove (63) being provided with an oil discharge port (64) for grease to return downward, and the bottom surface of the connecting piece (5) being pressed and covered above the return annular groove (63).

4. A uniform force damper according to claim 1, characterized in that: Sealing gaskets (3) are provided on both the upper and lower sides of the sealing ring (2).

5. A uniform force damper according to claim 3, characterized in that: The diameter of the connecting piece (5) is smaller than the diameter of the top of the piston block (6).

6. A uniform force damper according to claim 5, characterized in that: Vertical grease flow openings are distributed circumferentially on the side walls around the top of the piston block (6).

7. A uniform force damper according to claim 1, characterized in that: The top surface of the piston block (6) is provided with an adsorption hole (66) for adsorbing the bottom surface of the connecting piece (5).

8. A uniform force damper according to claim 1, characterized in that: The surfaces where the piston block (6) and the connecting sheet (5) are pressed together are arranged in a funnel shape.

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